Improved tuyere



N.PETERS, PHOTO-LITHOGRAPHER. WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

DANIEL S. LOY, OF GRACEHAM, MARYLAND.

IMPROVED TUYERE.

Specification forming part of Letters Patent N0. 48,963, dated July 25,1865.

To all whom it may concern Be it known that I, DANIEL S. LoY, ofGraceham, in the county of Frederick and State ot' Maryland, have madenew and useful Improvements in Tuyeres; and I do hereby declare thefollowing. to be a full, clear, and exact description of the nature,construction, and operation of the same, reference being had to theaccompanying drawings, which are made part of this specification, and inwhich- Figure l is a top view or plan. Fig. 2 is a vertical centralsection on the line x x, Fig. 1. Fig. 3is a plan of the circular-diskblast-plate. Fig. 4 is a section of the circular-disk blastplate. Figs.5 and 6 are plans of circular-disk blast-plates of various apertures.

The saine letters refer to corresponding parts in the different figures.

The object of my improvement is to obtain a blast ot' such a characteror direction as may be required for the varying kinds of work.

To enable one skilled in the art to which my invention appertains toconstruct and use the same, I will proceed lo describe it..

A may represent the brick-work of the blacksmiths forge, and B the wellor ashspace under the blast-plate O.

l) is the blast-pipe leading from the bellows. The blast-plate O hasupon it a bridge, c, which spans the central slit, c2, and heilig incontact with `the blast-plate on one side, c3, deecls the air and causesit to pass out at the long slit or oriice c4. The blast-plate O isremovable, and, being shown square, may be so placed as to deflect theair in either oi' the four directions which it is capable ot' assuming.The purpose subserved by this will be presently understood.

Figs. 3 and 4 represent circular-disk blastplates, in which the air ispassed in an even stream through a circular orifice. The square marginof the plate fits the same opening as is shown occupied by the plate inFigs. l and 2.

Figs. 5 and 6 represent circular-disk blastplates with circular openingsot' various sizes. Of the various blast-plates shown, one at a time isto be used, covering the opening above the well B, and the proper onewill be selected by the operator, according to the character of the workto be performed. The change is made in one case by shifting theblast-plate and changing the direction of the air which issues from thelong slit c4, and in the other case by the substitution of a blast-platewith a different sized aperture. To speak rst of the former case-namely,that shown in Figs. 1 and 2-it is frequently the ease that the smithdesires to give a certain direction to the heat of the lire, and theshape or size of the article may render it difficult ot' presentationexcept in one certain way. In this case7 being aware ofthe necessitiesof his work, he will so place the blast-plate as to direct the heat inthe most effective manner.

In steeling axes the smith may direct the blast upon the portion to bewelded, the bridge at the same time affording a partial protection forthe other portions ot' the aX. The long narrow heat is especially usefulin making gun-barrels. Other instances might be cited, but these maysutiice.

A mild even heat is obtained by the circular-disk blast-plate, whichadmits an equal amount of Iair at all points to pass to the lire. rlhesize of the opening is adapted to the character of the work by placingsuch a one'of the plates in position over the well as may be bestadapted to the designated purpose. As an instance of the work adapted tothis kind of opening I may mention brazing-in the bottom-of a brasskettle. The shape of the circular opening, tapering equally on bothsides, throws the blast directly upward, and not inwardly or outwardly,so that its full radial extension is utilized. The shape is alsofavorable to keeping clean, as any dust, einder, or bead of metal whichmay be detained in the aperture may be removed with facility, and will,together with the ordinary dbris which falls, be collected in a chamber,which is readily accessible for the purpose of cleaning.

The blast-plates are readily replaced as they may become worn.

Having described myinvention, whatIclaim therein as new, and desire tosecure by Letters Patent, is-

The blast-plate C, having a deilected slitopening, and capable, bychange ot' position, of directing the blast in the direction required,as described and represented.

The above speeilication of my improvement in tuyeres signed this 1st dayof May, 1865.

DANIEL S. LOY.

Witnesses:

ALEXR. A. C. KLAUGKE, CHARLES D. SMITH.

